'kgkadi.exe' Any ideas, Gentlemen?

[None of the above]

Light is beginning to dawn, Gentlemen.

The neighbour ran a malware scan (thanks, stickyb) which revealed twelve nasties, four of which relate to the problem under discussion.
The offending party is adware called 'NaviPromo' and the scan showed the following:

C:\Documents and Settings\User Name\Local Settings\Application Data\kgkadi.exe

C:\Documents and Settings\User Name\Local Settings\Application Data\kgkadi_navps.dat

C:\Documents and Settings\User Name\Local Settings\Application Data\kgkadi_nav.dat

C:\Documents and Settings\User Name\Local Settings\Application Data\kgkadi.dat

Everything has now been quarantined, although the 'kgkadi' entry is still listed as a start up program, albeit a deselected one. I can't find any trace of it in Windows Explorer or in 'Add/Remove programs'. A quick search reveals that there are ways and means of removing it but I've yet to pursue that course any further. It seems that P2P systems are frequently the conduit for such infections and said neighbour has one called 'Sopcast'. Probably bad form to point fingers, but in this instance I'm willing to do so.

Thanks, Gentlemen,

N o t a